<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Line</title>
    <style>
        #canvas {
            display: block;
            width: 600px;
            height: 600px;
            margin: 0 auto;
            border: 1px solid #cccccc;
        }
    </style>
</head>
<body>
<canvas id="canvas" width="600" height="600"></canvas>
<script src="example.js"></script>
</body>
</html>
